## Configure S3-compatible access for Echo

### Summary
Object storage client for a Echo app on Ample. Verified on Echo: bucket credentials delivered as encrypted S3_* environment variables and a validated PutObject/GetObject round-trip linked to a database row (upload=ok linked=ok). Build and start: CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build).

### Representative Queries
- Configure S3-compatible access for Echo
- Where can I host Configure S3-compatible access built with Echo?
- I need exact S3 endpoint, credentials, operation requirements and an upload/download verification.

### Resource Requirements
- primitive:compute
- primitive:s3-compatible-object-storage

### Infrastructure Requirements
1. **Compute:** Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
2. **S3-compatible object storage:** Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

### Prerequisites
- A Echo project (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build))
- A bucket from `ample bucket create` with credentials passed as encrypted S3_* environment variables
- An Ample account token with servers:write, buckets:read

### Tested Configuration
- **Template:** ubuntu-24.04
- **Runtime:** go
- **Size:** s-1vcpu-1gb
- **Build:** CGO_ENABLED=0 go build -o app ./...
- **Start:** ./app

### Workflow Steps
1. **Build and start**: CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build); the server must bind 0.0.0.0 on PORT.
2. **Create the bucket and pass its credentials**: Create it once with `ample bucket create`, then pass endpoint, region, bucket and keys with --env; use path-style addressing.
   
   **Command**: ample deploy . --name  --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...
3. **Verify**: Fetch the live URL and /p/browser-file-uploads on the example; on failure read the build and runtime logs.
   
   **Command**: ample logs  --kind build

### Examples
- **Echo pattern fixture**: Verified object storage client on Echo.

### Success Checks
- App responds on its public URL.
- Browser-file-uploads check from the example.

### Limitations
- Verified on the ubuntu-24.04 template at s-1vcpu-1gb; other sizes and Echo major versions are not verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.

### Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 5.0
- **Basis**: Size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty

### Evidence Summary
- **Canary Run**: Echo pattern fixture deployed on Ample (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build)).

### Next Actions
1. **Browse the catalog index**: GET /v1/catalog
2. **Search published recipes**: POST /v1/catalog/search
3. **Prepare deployment plan**: POST /v1/catalog/plan